Part numbers Branded as the ThinkPad Serial ATA Hard Drive Bay Adapter IIIīranded as the ThinkPad 9.5mm Serial ATA Hard Drive Bay Adapter IIIĬertain clones are built in such a way that they unintentionally create a poor connection to the Ultrabay's connector, which can be seen here: This HDD adapter requires a caddy tray/bracket to be screwed onto the 2.5-inch storage drive, however if that is not possible, the screws can be used instead of the caddy tray/bracket.